ENG-4441 remove trial license from enterprise kits
Fix broken TestLiveTableSchemaMigration when built under MEMCHECK.
Add a method to TableHelper to sort tables (not performant) so the equality check in this test works when table storage has no order.
Fix two unrelated memcheck failures: A leak in the new aggregate executor and a limitation in the IPC framework.
Also hacked TestSQLFeaturesSuite to make it trivial to toggle the suite to run only in IPC debug mode.
Merge branch 'ENG-4441-remove-trial-license-from-kits'
Merge pull request #421 from VoltDB/memcheck-fixes

memcheck fixes ready for review. Check for jenkins blue before merge.
Merge remote-tracking branch 'origin/master' into elastic